chore(ci): add the Feature Flags feature to nox tests (#4570)

Adding Feature flags test

Author: leandrodamascena

noxfile.py

@@ -95,10 +95,12 @@ def test_with_xray_sdk_as_required_package(session: nox.Session):
 def test_with_boto3_sdk_as_required_package(session: nox.Session):
     """Tests that depends on boto3/botocore library"""
     # Parameters
+    # Feature Flags
     build_and_run_test(
         session,
         folders=[
             f"{PREFIX_TESTS_FUNCTIONAL}/parameters/_boto3/",
+            f"{PREFIX_TESTS_FUNCTIONAL}/feature_flags/_boto3/",
         ],
         extras="aws-sdk",
     )